Not many details, so I'll describe what I encountered. If that doesn't apply, you'll have to provide more info. My first search yielded lots of results for a broken rear door handle. Ours wasn't broken, but it was sticking. The handle would pull in but wouldn't return. Lots of detailed instructions online, but basically while inside the van, remove the 2 bolts from the handle and the bolt from the pull strap, then remove the panel.
Whilst sitting inside the van, key lock is left of the handle, with a rod connecting to the latch at the bottom. The latch has a J shaped slot with a plastic pin protruding. If pin is in the bottom part of the J, the door is locked; unlocking the door should move the pin to the top part of the J. You can test moving the rod up to lock, or down to unlock.
The problem I found was that something was binding, preventing the return spring from doing its job. The J was in the wrong position, so the door wouldn't unlock. I suspect either replace or lube the cable from handle to latch mechanism. Hope this helps. -D
Take te child lock off of the door
The child lock could be on.
Unlocked is a past tense verb and an adjective. Verb: Dave unlocked the door just before the icicle fell. Adjective: Please lock all the unlocked doors.
Try using the key to open the lock mechanism while the door is unlocked.
There is not release. The fuel door has a lock. When the doors are locked, the fuel door is locked. When the doors are unlocked the fuel door is unlocked. When the doors are unlocked, press on the front of the fuel door (the side closest to the front of the car). It should pivot open.
As long as the door is locked on the outside, the inside door lock of a keyed doorknob will also always be locked from the inside.
If the lock switch is set to unlocked and it will not open from the inside or outside, the door lock arm may have fallen lose. Take the inside door panel off and check around the door levers and door lock.
Make sure the door lock is set to the unlocked position, then pull on the door handle.
The fuel tank lock is tied into the vacuum door lock system. When the doors are unlocked then so should the trunk and gas cap. The door lock can be released from inside the trunk.
Hint: Have you checked the child-proof door lock button located in the door's door jamb to make certain it is in the unlocked position?
Storeroom lock
Press the PWR DOOR OFF button to the left of the steering column.